Rubber drilling, or drilling rubber?

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Bamamav

Well-known member
Joined
Mar 29, 2012
Messages
6,171
Location
Berry, Alabama
I've got some rubber conveyor belting strips I want to use for between my trans mount and frame. Need a couple of 3/8" or 1/2" holes for the mount bolts to go through. How would be the best way to go about drilling the rubber? Last time I tried to use a piece like that, I drilled a hole, but never could get it large enough, when the bit came out, the hole would close up! I don't have any way to punch them, either. Any ideas?
 
I've cut holes in rubber by making a punch out of a piece of pipe. I just grind it on a taper. drive it through with a big hammer. You could also use a press to push the cutter through the rubber.
 
I use a 1/2" plug cutter bit on the drill press. Cutter teeth will cut a pretty clean hole for large bolts. Those bits are designed to cut a wooden plug from a board. Hardware stores have them. Leaves a hole thru conveyer belting or mat that's about 5/8" dia. I'll get a shot of mine later if you like.
If you need smaller diameter hole go for smaller bit. It'll cut about 1/8" larger than the plug it's designed to cut when you're talking hole size, roughly.
 
These work well for drilling holes in rubber belting/

SAE-3-16-7-8-Hss-3-8-Triangle-Shank-Titanium-Coated-font-b-Tapered-b.jpg
 
whut to do

I have drilled rubber a size larger than needed. Ground a point or taper on your bolt and thread in.
 

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